1 /* Copyright 2003-2013 Joaquin M Lopez Munoz. 2 * Distributed under the Boost Software License, Version 1.0. 3 * (See accompanying file LICENSE_1_0.txt or copy at 4 * http://www.boost.org/LICENSE_1_0.txt) 5 * 6 * See http://www.boost.org/libs/multi_index for library home page. 7 */ 8 9 #ifndef BOOST_MULTI_INDEX_DETAIL_MODIFY_KEY_ADAPTOR_HPP 10 #define BOOST_MULTI_INDEX_DETAIL_MODIFY_KEY_ADAPTOR_HPP 11 12 #if defined(_MSC_VER) 13 #pragma once 14 #endif 15 16 namespace boost{ 17 18 namespace multi_index{ 19 20 namespace detail{ 21 22 /* Functional adaptor to resolve modify_key as a call to modify. 23 * Preferred over compose_f_gx and stuff cause it eliminates problems 24 * with references to references, dealing with function pointers, etc. 25 */ 26 27 template<typename Fun,typename Value,typename KeyFromValue> 28 struct modify_key_adaptor 29 { 30 modify_key_adaptorboost::multi_index::detail::modify_key_adaptor31 modify_key_adaptor(Fun f_,KeyFromValue kfv_):f(f_),kfv(kfv_){} 32 operator ()boost::multi_index::detail::modify_key_adaptor33 void operator()(Value& x) 34 { 35 f(kfv(x)); 36 } 37 38 private: 39 Fun f; 40 KeyFromValue kfv; 41 }; 42 43 } /* namespace multi_index::detail */ 44 45 } /* namespace multi_index */ 46 47 } /* namespace boost */ 48 49 #endif 50